The Lemon IndexThe other computers in the car stopped hearing from the gateway module.
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
Wiring or connector fault on the data network. Then: power or ground problem at the gateway module; failed gateway module.
Owners named U0146 in 11 complaints to the U.S. government, most often on the Chevrolet Silverado.
Cars owners report it on
Complaints that name U0146, by model. Raw counts, not a failure rate: popular models get more complaints.
Years owners report it on most: 2025 GMC Sierra · 2020 Chevrolet Silverado · 2019 Chevrolet Silverado
The details
What U0146 means
The other computers in the car stopped hearing from the gateway module. Features that depend on it can stop working, and several warning lights often come on together.
Can I drive with U0146?
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
36% of the owner complaints that name U0146 also say the car warning lights and electrical faults. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of U0146
- Wiring or connector fault on the data network
- Power or ground problem at the gateway module
- Failed gateway module
- Weak battery
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Warning lights and electrical faults: 36% of complaints
- Brakes or ABS act up: 27% of complaints
- Transmission slips or shifts hard: 18% of complaints
Share of complaints naming the code whose text also mentions each problem.
Model years that report U0146 most
2025 GMC Sierra (3), 2020 Chevrolet Silverado (2), 2019 Chevrolet Silverado (2).
Related codes
U0141 U0140 U0151 U0155 U0159 U0131 U0129 U0164
Quick answers
What does U0146 mean?
Lost Communication With Gateway "A". The other computers in the car stopped hearing from the gateway module. Features that depend on it can stop working, and several warning lights often come on together.
Can I drive with U0146?
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
What causes U0146?
Wiring or connector fault on the data network; Power or ground problem at the gateway module; Failed gateway module; Weak battery.
Counts: NHTSA owner complaints whose text names U0146. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.